Pulp-making wood-grinder.



(No Model.)

Fig.1.

Patented Dec. 3, 190i. M. R. RUST.

PULP MAKING WOOD GRINDER.

Application filed Jan. 24, 1901.)

3 Sheets-Sheet I.

naw/whom THE NORRIS PETERS co. PHOfO-U'KNQ, WASHINGTON, u. c.

3 Sheets-Sheet 2.

Patented Dec. 3, I90].

M. R. RUST.

PULP MAKING WOOD GRINDER.

(Application filed Jan. 24, 1901.)

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Patented Dec. 3, I901.

M. R. RUST PULP MAKING WOOD GRINDER.

'Application filed Jan. 24, 1901.)

3 Sheets-Sheet 3.

(No Model.)

.u w i L j i 9w T I .L No I w T I 1 L l l t a I 1 I t W 5m 0% wonmspawns co. PHOTQLWHO" WASI'HNGTON. I c.

rrun STATES PATENT OFFICE.

MORTIMER R. RUST, OF FULTON, NEW YORK, ASSIGNOR TO FRANK I3. DILTS, OFFULTON, NEW YORK.

PU LP-MAKING WOOD-GRINDER.

SPECIFICATION forming part of Letters Patent No. 688,197, dated December3, 1901.

Application filed January 24, 1901. Serial No. 44,593. (No model.) 7

such as will enable others skilled in the artto which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the figures of reference marked thereon, which form a part ofthis specification.

My invention relates to pulp-making woodgrinders, and has for its objectthe production of a machine of the class stated adapted to grind woodinto pulp for paper-making by pressing it against a revolving millstoneand in which machine horizontally adjustable and guided grinder-platesdivide the casing of the device into separate internal compartments orpockets for the reception of the charge of wood to be comminuted.

The object of my invention includes also the provision of grinder-platesof peculiar and special construction,havinginteriorly-formed ductsarranged to convey the shower-water to the edges of the plates next thestone and perforations through which the water is delivered to thematerial and stone.

Another object of my invention is to afford a system of valves andpiping by which the water discharged by a closing pocket can be causedto open another pocket from which the wood has been ground away.

Each constituent element of my invention is described in detail, and itsindividual 0ffice, together with the mode of operation of the whole,fully explained hereinbelow.

Of the accompanying drawings, throughout which like numerals designatelike parts, Fig ure 1 represents a side view, partly in verticalsection, showing the hydraulic-press cylinders, piping, and valveconnections, the pistons, rods, and presser-heads, and devices foradjusting the grinder-plates. Fig. 2 is an end view of my invention.Fig. 3 is a plan view of one of the larger grinder-plates; Fig. 4:, a

cross-section of the plate on line b b of the third figure; Fig. 5, across-section of the plate on line 0 c of the third figure, and Fig. 6 aView of the end of the plate which lies outside the casing. Fig. 7 is aplan view of one of the smaller grinder-plates, Fig. 8 being across-section on line d d of Fig. 7; and Fig. 9 is a view of the end ofone of the smaller plates lying outside the casing. The scale ofdrawings increases after Fig. 2 to more clearly exhibit the specialfeatures of the grinderplates.

Considering Figs. 1 and 2, numerals land 2 mark the sides of the casingand numerals 3 and 4 its ends. The casing may be of any shape, usuallyrectangular, with a rise in the top, as shown, to accommodate the stone,and an open bottom through which the pulp finds its way to a floor. ortable and upon which it gathers until removed. The sides, top, ends, andbottom of the casing are bolted together substantially as shown.

The millstone 5, the shaft 6, by which the stone is centrally supportedand driven, and the shaft-bearings 7 and 8 are all familiar elements andcall for no special description.

As ordinarily constructed, I employ six grinder-plates-four large topand bottom plates, all alike, and two smaller middle plates, which areduplicates. To support and guide the grinder-plates, I form in the sidesof the casing corresponding longitudinal rectangular parallel recessesor grooves. These grooves are precisely the same in formation andlocation on both sides of the stone. In Fig. 1 are shown the grooves andtheir positions upon one side of the casing, and this illustration wouldserve as well to indicate those upon the other side or near side onFig. 1. Of those shown the upper groove is numbered 9, the the middlegroove 10, and the lower groove 11. All the gtooves reach inwardly fromthe ends far enough to intersect the circumfer-' ence of the stones diskif projected upon the sides, and the upper and lower grooves eX- tendthe entire length of the casing. The elevated or projecting parts of thesides of case ing running lengthwise and marked 12, 13, and 14 indicatethe positions of the grooves in the near side, Fig. 1. In Fig. 1 alsoappear the hydraulic press cylinders, arranged in pairs attached to eachend of the casing, one member of each pair directly over the other.

These cylinders are marked 15 16 on the left and 17 18 on the right ofthe figure. Each of the cylinders is furnished with a piston,pistonrod,and presser-head. In the sectional portion of Fig. 1 theseparts relating to the cylinders 15 and 16 are shown. Of cylinder 15 thepiston is designated by number 19, the rod is marked 20, and thepresser-head 21. Of cylinder 16 the piston is numbered 22, the rod 23,and head 24. As shown, cylinder 15 has a port 25 leading in toward itsouter head and a port 26 leading in near the inner head of thatcylinder. Port 26 has a second opening 27 into it from the surface ofthecylinder. Cylinder 16 is similarly provided with outer port 28, innerport 29, and its second openin g 30.

To govern and direct the pressure-water, I may employ any of the valveand piping systems in use with these machines. I prefer, however, to usea three-way-valve arrangement for each cylinder, placing bothvalve-seats on one base-casing 31. In Fig. 1 I have removed thehand-levers and have shown the common top or face of the casing of twovalves, as well as the valves themselves, in section in order to exhibitthe ports covered by the valves. A further advantage of thus combiningthe two valves is that a single admission or service opening in the topand a single exhaust-orifice in the valve-base suffices for both. Number32 marks the portion remaining of the top of the valve-casing. Itincludes the upper valve-chamber 33,havin g the inlet-opening 34, whichin practice is connected with the pump, a lower valve-chamber 35, and aduct 36 joining the two chambers. The valves 37 and 38 may be hollowcastings of the quadrantal form shown or any other convenient shape.They are secured to the stems 39 and 40 and turned by means of thehand-levers 41 and 42. (See Fig.2.) In Fig. 1 both valves are shown intheir mean positions and the pressure-water is cut off from bothcylinders. The valves are held to their seats by the pressure of theWater from the pump. Valve 37'the upper one covers port 43, opening intoa duct leading to the exhaust-port 44 in the valve-seat base. (See Fig.2.) It also covers, in the position illustrated, the two ports 45 and46, and the valve may be turned to connect either port with theexhaust-ports 43 and 44 and leave the remaining port open to thepressure-water. Port 45 leads to pipe 47, connecting the valve-seat baseand the upper cylinder 17, by way of coupling 48 at the top of Fig. 2,and port 46 leads to pipe 49, which likewise connects base 31 with thatcylinder. lylinder 17 is provided with ports exactly the same as thosenumbered 25, 26, and 27 belonging to cylinder 15. Hence pipe 49 wouldlead the pressure-water in near the outer cylinderhead of the cylinder1'7 and pipe 47 would deliver the pressure-water near the innercylinder-head. As ordinarily arranged, pipe 49 possesses no intermediatevalve, while pipe 47 includes near the top a globe-valve 50. Valve 38thelower onec0vers port 51,1eading, as indicated by broken lines, to thecommon exhaust-port 44 in the valve-seat base 31. It covers also, in itsmean position, the ports 52 and 53, and either of these ports may thusbe opened into the exhaust and the other one uncovered to thepressure-water, as already explained.

Number 18 marks the lower cylinder at the right in Fig. 1. It possessesthe same sort of internal ports as shown to belong to cylinders 15 and16. Port 52 opens into pipe 54, which is provided at its lower extremitywith a globe-valve 55, and which leads thence by coupling 56 to thecylinder-port opening internally near the inner cylinder-head. Pipe 57,continuing port 53, leads to the cylinderport opening internally nearthe outer head of cylinder 18. As is the case with cylinders 15 and 16,the rearwardly-extendingcylinderports have each a second opening, andthese two extra openings of the cylinders 17 and 18 are directlyconnected by the pipe 58 back of the cylinders. Pipe 58 includes twocut-01f or globe valves-one, 59,introduced at the top, and the secondvalve, 60, near the bottom. Midway between the two valves just mentionedis located the safety-valve 61 for the purpose of permitting watercontained between the inner faces of the pistons and innercylinder-heads to escape, even though the valves and should be closedand that fact overlooked. and action of the safety-valve no harmfulstrain is apt to be thrown upon the machine and any surplusage of wateris discharged.

By means of the pipes, valves,and connections described above it will beseen that each piston and presser head may be operated alone toward orfrom the stone. Valves 59 and 60 of pipe 58 being closed and valves 50and 55 opened, each cylinder, piston, rod, and head is entirelyindependent of the others. My invention is, however, most advantageouslyused as a two-pocket continuous feed-grinderthat is to say,two of thepockets are always grinding and two are always charged with wood to beground. The continuous grinding prevents racing or undue speeding up ofthe stone. In practice an upper cylinder at one end of the machine and alower cylinder at the other end are set grinding together, thusbalancing the pressures on the stone and producing superior pulp. Theremaining pockets are filled and ready, and at the proper time they arecaused to grind, their cylinders forcing the wood to the stone, and thepressure is relieved in the first two cylinders. To avoid wasting waterconstantly, I operate my invention in the following manner: When it isdesired to open a pocket, water is let in behind the piston to move itoutwardly and the water fills the cylinder. Instead of discharging thiscylinder of water directly out of the machine I close valves 50 and 55and open valves 59 and 60 By reason of the presence and compel thegrinding cylinder to discharge the water held in rear of its pistonbehind the piston of the companion cylinder below it-that is to say,cylinder 17 in closing its pocket would press water from behind itspiston into cylinder 18 to the rear of its piston, the piston of theupper cylinder moving toward the stone and that of the lower cylinderfrom the stone, or vice versa. WVater in front of the pistons is ofcourse discharged by way of the exhaust-port 44.

In Fig. 1 will be seen two of the four doors by way of which the blocksof wood to be ground are placed before the presser-heads in thecompartments between the grinderplates. Two of the doors only are shown.The upper door is designated by number 62 and the lower by 63. The tworemaining doors admit the wood to the compartments shown in thesectional portion of the figure. They do not vary in any particular fromthe two doors illustrated.

The peculiar construction of the grinderplates is an important part ofmy invention. In the sectional part of Fig. 1 are shown two of thelarger grinderplates, designated by numbers 64 for the upper and 65 forthe lower. Partly hidden by the casing are two more plates 66 and 67,upper and lower, precisely like the one illustrated, the construction ofall being the same. Fig. 3 is a plan of plate 64 or of either of thelarger plates. As usually cast its weight is materially reduced byforming the series of longitudinal slots. (See Fig. 4.) At the inner endis a row of toothlike projections 68, and near the opposite end is arecessed portion 69. (See Figs. Sand 5.) The top and bottom edges of theends 3 and 4 of the casing fit these recesses of the large plates. Atthe rear corners are the lugs 70 and 71, extending beyond the sideedges, (see Fig. 6,) and which will be again referred to. The lugs areshown on each of plates 66 and 67, (marked 72 72 and 73 73,respectively, in Fig. 2.) There are two middle plates. One of these,plate 74, appears in section, and the other, plate 75, is partly hiddenby the casing. (See Figs. 1 and 2.) Figs. 7, 8, and 9 indicate the formof the middle plates. At one end are tooth-like projections 76 of thesame size and shape as those belonging to the larger plates. At the rearplate 74 has a portion 77 cut away, and at the rear corners are theoutwardly-extending lugs 78 78, precisely like those of the largerplates, and these will be mentioned again. The lugs 79 79 are shown forplate in Fig. 2. To effectively conduct and deliver the shower-water,all the plates, both large and small, are cored when cast to produce theside and end ducts indicated, or they may be hollow throughout. Plate 64is shown to possess the lengthwise side ducts or channels 80 and 81,joined by the end duct.

82, and in Fig. 3 the perforations 83 between the teeth 68 are seen.Through these holes the water is delivered directly upon the stone. Theends of side ducts 80 and 81 outside the casing are provided withthreaded mouths, such as mouth 80 of duct 80, open for connection with awater-pipe of any convenient construction and arrangement or closed by ascrew-plug 81, as shown. In Fig. 6 are shown the two screw-holes 84 and85 through the outer portions of the lugs 70 and 71. The lugs of all theother grinder-plates are provided with like holes. All are interiorlythreaded and engage scr'ews-such as those marked 86 86, 8787, and 8888through logs on the right of Fig. 1.. (See also Fig. 2.) Theseclampingscrews pass through the cleats,such as 89 90 91, on the flangeof side 2 of the casing, and nuts 92 93 94, usually constructed withradial holes for the reception of the end of alever, fit the screws andbear against the cleats. It will be noted that the outer ends of thescrews are squared. If, therefore, the proper nuts be held stationary bysuitable pins or levers and wrenches applied simultaneously to thesquared ends of the screws concerned, the grinder-plate, of which theseelements constitute the adjusting mechanism, may be moved toward or awayfrom the millstone.

Figs. 7, 8, and 9 show the lengthwise side ducts 95 and 96 and the endor cross duct 97, together with the perforations 98 between the teeth of76 of small grinder-plate 74 for conveying and delivering theshower-Water to the stone, as already explained in the description ofthe larger plates. Each grinderplate has one side duct plugged and oneconnected with the water-service pipe. Thus plates 66, 74, and 67 haveopen screw-threaded months, respectively numbered 99, 100, and 101, andone side duct closed by screwplugs 102, 103, and 104. In practice theopen mouths are served by branches from a single water-pipe connected bya hose with the source of supply. The actual arrangement of the pipingby which the shower-water is served to the plates is capable of beingconsiderably varied under difierent conditions.

I am aware that the hydraulic-press cylinders with their containedworking parts and the means of operating them are of the usual form inmachines of this class, and I do not claim those features.

What I claim, and desire to secure by Let ters Patent of the UnitedStates, is-

1. In a pulp-making wood-grinder, the combination of the casing havinghorizontal guidegrooves, a revoluble stone within the casihg, flatupper, middle and lower grinder-plates adjustable in the guide-groovesof the easing toward or from the stone and means for adjusting the saidplates, the said middle plates being movable directly toward the axis ofthe stone, and the upper and lower plates movable tangentially towardthe stone where by the casing is interiorly divided into two pairs oflike upper and lower compartments arranged directly opposite each otherupon opposite sides of the stone, the said upper compartments beinglocated above the axis of the stone and the said lower compartmentsbelow that axis, and mechanism adapted to press against the stone woodplaced in said compartments, substantially as described.

2. In a pulp-making wood-grinder, fiat grinder-plates having formedwithin them transverse ducts and perforations leading from thetransverse ducts through the adjacent ends of the plates, and otherducts also formed within the plates and adapted to conduct water fromthe exterior to the said transverse ducts, substantially as described.

3. In a pulp-making wood-grinder, fiat grinder-plates provided with aseries of projections at one end, the said plates having formed withinthem transverse ducts and perforations leading from the said transverseducts and opening between the said projections, the said platespossessing other ducts also formed within them and adapted to conductwater from the exterior to the said transverse ducts, substantially asdescribed.

4:. A grinder-plate having internal side ducts connected by a transverseinternal end duct, discharge perforations from the said end duct, thesaid plate being recessed at its ports of eachcylinder, one of the saidports of each cylinder possessing a second opening to the surface of thecylinder, a pipe directly connecting the said second openings'of thesaid ports, and cut-off valves included in the said pipe, substantiallyas described.

In testimony whereof I affix my signature in presence of two witnesses.

MORTIMER R. RUST.

\Vitnesses:

H. L. PLATT, H. L. LAKE.

